Gas mixer



Nov. 17, 1936. x BONEM AL, 2,060,972 v GAS MIXER Filed Sept. 20, 1954 INVENTORS, Franfl A. B0 "677?,

Bg foy 144 50274772 A TTORNEY.

I Patented Nov. 17, 1936 UNITED STATES PATENT OFFICE GAS MIXER Frank X. Bonem and Roy W. Bonam,

Detroit, Mich.

Application September 20, 1934, Serial No. 744,769

' Claims. (01. 4s 1s0) This invention relates to gas mixers and the shape as the flanges 5 and 6 of the carburetor and object of the invention is to provide a device to intake manifold and this plate 7 is provided with be positioned between the carburetor and the an extension 8 at one end. The plate I forms intake manifold of an internal combustion ena cover plate for a thicker fiat metal member 5 gine to admit additional air to the fuel mixture 9 shown in Figs. 2 and 3. This member 9 is proat the higher engine speeds to thereby effect vided with a recess II] to receive one end of the economy in fuel consumption at constant engine operating bar I I which, as shown in Figs. 1, 2 and speeds. 3, extends diametrically across the central open- A further object of the invention is to provide ng l2 in the member 9 and plate This lo a device of the character described which is fitted I I is provided with a struck up rib I3 for strength 10 between the carburetor and intake manifold and and a longitudinal recess I4 is provided in the in which the air inlet is automatically sealed at extension I5 of the member 9 beneath the plate 8. low engine speeds. The bar I I extends into this recess and is pro- Another object of the invention is to provide vided with a semi-spherical projection I6 which a device of the character described which is aunormally closes the inlet aperture H in the meml5 tomatically controlled in accordance with the sucher 9. The plate I is provided with an upwardly tion produced by the speed of the engine. pressed boss I8 and a spring I9 is positioned be- A further object of the invention is to provide tween the boss I8 and the projection I6 of the an automatic control of the character described bar or arm I I. A gasket is positioned on the top in a flat member which may be readily mounted and bottom of the device shown in Fig. 2 and the 2 between the carburetor and intake manifold. device with the gaskets is then fitted between the Another object of the invention is to provide flanges 5 and 6 of the carburetor and intake mana control bar which is moved by the: suction proifold and these flanges are firmly secured together duced at the higher engine speeds to open the by tightening the screws 23 shown in Fig. l. 25 air inlet. When so assembled, the portion I5 of the mem- 35 These objects and the several novel features her 9 and the extension 8 of the plate i extend of the invention are hereinafter more fully deoutwardly to one side of the flanges 5 and 6, as scribed and claimed and the preferred form of shown in Fig. 1. construction by which these objects are attained The spring I9 is of sufficient strength as to preis shown in the accompanying drawing in which-- vent movement of the bar II under low engine 30 Fig. 1 is an elevation of a carburetor and inspeeds but as the engine speed is increased, the take manifold showing our fuel economizer convelocity of the fuel gas and air mixture flowing nected therebetween. through the carburetor outlet and intake mani- Fig. 2 is an enlarged perspective view of the fold will lift the bar II against the tension of the fuel economizer. spring I9 thus opening the inlet port I1 and allow- 35 Fig. 3 is an enlarged section taken on line 3-3 ing air to flow through the recess I4 into the of Fig. 2. central opening I2 of the device where it is mixed Fig. 4 is a perspective view of a modified form with the fuel mixture and carried into the enof the fuel economizer. gine, not shown. As the engine speed again re- 40 Fig. 5 is an enlarged section taken on line 55 turns to low speed, the spring I9 forces the pro- 40 of Fig. 4. j ection I6 back into the inlet port I! thus shut- Fig. 6 is an enlarged section taken on line 6-6 ting off the air inlet and allowing the engine to of Fig. 4. continue at low or idling speeds.

Fig. 7 is an enlarged Section taken on line 'I-'| With the usual internal combustion engine, the of Fig. 4. carburetor is set to provide the proper mixture 45 The device is intended to be connected between for low and idling speeds but as the speed of the the intake manifold I of an internal combustion engine is increased the mixture provided is richer engine shown in Fig. 1 and the outlet conduit 2 than necessary to produce ideal engine operation of a carburetor which may be of any standard and, consequently, the admission of additional type. The carburetor shown is provided with a air to the mixture at higher engine speeds pro- 0 bowl 3 and with an air cleaner 4 and is provided duces better engine operation at these speeds with a flange 5 which is of the same shape and and it also results in fuel economy due to the size as the flange 6 of the intake manifold I. As fact that the additional volume required by the shown in Fig. 2, the fuel economizer comprises a engine is partly supplied by the additional air metal plate 1 which is of substantially the same entering through the air inlet I1. 55

A modified form of the device is shown in Fig. 4 in which a member 2| is provided of the same shape as the member 9 and a recess 22 for the end of the bar ll shown in Fig. '7 is cut into the member 2| by means of a key slot cutter. At the opposite end, a slot 23 is milled out of the extension 24, as shown in Figs. 5 and 6, and a plate 29 is in-set into the bottom of this slot while a plate 25 is in-set into the top of the slot. These plates may be pressed in place or welded in place, as desired, and the plate 29 is provided with an air inlet port 26 which is normally closed by the projection N5 of the arm II and the plate 25 is provided with an upwardly pressed boss 21 to receive the spring 19. In this case, the member 2| is made from one piece which may be a die casting, if desired, and the plates 29 and 25 are set into the die casting.

In both cases, the end of the bar H opposite the depression I6 is semi-floating, it being merely necessary to freely support this end in order to allow the action to take place between the projection l6 and the air inlet port. By this arrangement, the bar I I will remain in position to close the air inlet port even though it is semifioating but upon increased engine speeds the bar is lifted upwardly against the tension of the spring 19 to open the air inlet port and allow additional air to enter the central opening l2 and mix with the fuel vapor or gas and air mixture passing therethrough.

From the foregoing description it becomes evident that the device is very simple and efficient in operation, will not easily get out of order, is composed of few parts and is of consequent low manufacturing cost and provides a device which accomplishes the objects described.

Having thus fully described our invention, its utility and mode of operation, what We claim and desire to secure by Letters Patent of the United States is-- 1. In a gas mixer for use between the intake manifold and the carburetor of an internal combustion engine, a member shaped to fit between the carburetor and intake manifold and having an aperture registering with the conduits of the carburetor and intake manifold, a non-pivoted bar extending across the aperture of the said member, said member having recesses on diametrically opposite sides opening to the aperture of the member and of a width transversely of the bar greater than the thickness of the bar and in which the respective ends of the bar lie, the bar being provided near one end with a projection and the member being provided with an air inlet port opening to the recess for that end of the bar having the projection, a spring normally holding the bar in position with the projection closing the air inlet port, the arrangement being such that the velocity of the mixture passing the bar upon reaching a pre-determined point will lift the bar bodily against the spring to the extent allowed by the spring and width of the recesses and open the air inlet port.

2. In a gas mixer, a flat member adapted to be secured between the carburetor and intake manifold of an internal combustion engine, said fiat member being provided With an aperture registering with the conduit of the intake manifold, a non-pivoted bar extending across said aperture, the flat member being provided with an extension at one side having a recess open at one end to the aperture of the member into which the bar extends, the bar being provided with a projection in said end, the recess for the fiat member being provided with an air inlet port, and a spring normally pressing the projection to position to close the air inlet port.

3. In a device of the character described, a substantially flat member having a circular opening, said member being provided with an extension at one side and the extension being provided with a recess communicating with said central opening, a bar extending into said recess and across the central opening, the extension being provided with an air inlet port opening into the recess, a projection on the bar normally fitting said inlet port, and a spring holding the bar in position to engage the projection in the inlet n port, the arrangement being such that a predetermined pressure against one side of the bar will raise the bar against the spring to the extent allowed by the width of the recess and open the inlet port.

4. In a device of the character described, a substantially flat member having an opening therethrough and an extension at one side of the opening, the extension being provided with a recess communicating with the said opening and the flat member being provided with a second recess on the side of the opening diametrically opposite the first recess, a bar extending across the opening into both recesses, the end of the bar in the recess of the extension being provided with a projection, the extension being provided With an air intake port opening into the recess, and a spring normally pressing the projection of the bar into the air intake port, the spring being arranged to allow the bar to raise when a predetermined pressure is applied thereto.

5. In a device of the character described,a memher having a central opening, a flat sheet metal bar extending diametrically across the central opening, one end of the bar being provided with a projection and said member having a recess in communication with the central opening in which the end of the bar lies, the said member being provided with an air intake port normally closed by the projection of the bar, a coil spring engaging the bar opposite the projection and resisting movement of the bar by air flow through the said central opening of the member and said air intake port being in communication with the central opening of said member.

FRANK X. BONEM. ROY W. BONAM. 

